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WorksheetsQuiz Revision Science Form 3 Chap 5, 6 & 7
Total questions: 40
Worksheet time: 20mins
Which reaction explains about exothermic reaction?
Heat is absorbed from the surroundings
Surrounding temperature increases
Heat energy is changed to chemical energy
Thermometer reading decreases
Which statement is correct about endothermic reaction?
Heat is released
Thermometer reading increases
Surrounding temperature increases
Breaks the chemical bonds of the reactant
Respiration is an exothermic reaction.
Which of the following explains about the process?
Release heat to the environment
The chemical bond in glucose is broken down
Heat energy is changed to chemical energy
Forming oxygen as byproduct
Which process does not involve the release of heat energy?
The combustion of petrol
The formation of ice
Volcano eruption
Melting of butter
The diagram shows sublimation process that occurs in dry ice.
This process is endothermic. Why?
New substance is formed
There is a conversion of energy
Dry ice absorbs heat from surroundings
The water vapour formed is very cold.
Endothermic is a reaction that absorbs heat.
TRUE
FALSE
Breaking the chemical bond releases energy.
TRUE
FALSE
What happens when heat energy is absorbed?
Bond formation occurs
Exothermic reaction
Bond breakage occurs
No change occurred
The diagram shows the set - up of apparatus for an experiment.
Which of the following statements is true about the reaction that occurred in the experiment?
Temperature of water increases
Heat energy is absorbed from the environment
Exothermic reaction occurs
Heat energy is released during reaction
How can we identify that the absorption of heat has occurred?
The surrounding temperature increases
The surrounding temperature decreases
The container will heat up
No change occurs
The diagram shows a chemical reaction.
The initial temperature of distilled water is 27⁰C.
What temperature may be recorded by the thermometer in the sodium hydroxide solution?
35⁰C
20⁰C
18⁰C
10⁰C
Which of the following is an endothermic reaction?
Photosynthesis
Respiration
Burning of dried leaves
Neutralisation
What is the use of hot pack?
Treating swelling
Cure fever
Relieve joint pain
Relieve inflammation
The temperature of the substance in a reaction remains constant after reaching the thermal equilibrium.
TRUE
FALSE
Which of the following that not describe the characteristics of non-renewable energy sources?
Can be depleted if the usage is not controlled
Takes millions of years to be formed
Can not cause environmental pollution
Have limited sources
The diagram shows an apparatus.
Which of the following statements are false about the apparatus?
It is used to change a low input voltage to a higher output voltage
It alters the voltage of alternating current
It is used to change a high input voltage to a lower output voltage
It helps to reduce energy wastage during the transmission of electrical energy
The diagram shows four transformers, A, B, C and D.
Which transformer is a step - up transformer?
A
B
C
D
Where does the electric power voltage begin to be lowered in the electricity transmission and distribution system?
Substation
National power grid
Switch field
Main substation
An electric iron is rated 1050 W, 240 V.
Which of the following is a suitable fuse rating for the iron?
1 A
2 A
3 A
5 A
The statements are about a type of energy source.
What is the energy source?
Nuclear
Water
Geothermal
Sun
What is the function of the National Grid Network?
Transmit electrical energy all over the country through high voltage cable network
Collect and channel the electrical energy to the consumers
Store voltage for emergency use
Lower the value of voltage to suit the supplied area
Some energy source are renewable while some are non - renewable.
Choose on non - renewable energy sources.
Natural gas
Water
Geothermal
Coal
Fuse rating is the minimum value of the current that can flow through it.
FALSE
TRUE
Fuse wire has a low melting point so that it can easily melt when high current passes through it.
FALSE
TRUE
Which of the following is non - renewable source of energy?
Diagram below shows a process to generate induced current through relative motion of the coil with magnet.
How to prove that the induced current has been generated?
The coil becomes hot
The bar magnet becomes hot and melt
The needle of Galvanometer deflects
The needle of the Galvanometer vibrates
A device had been installed in a circuit causing the reading of the voltage supplied in the circuit to increase from 20 V to 100 V.
What is the device?
Resistor
Dry cell
Transformer
Fuse
What is the S.I unit for work done?
Newton
Joule
Watt
Newton Meter
Diagram shows the sack of rice being pushed over a distance of 5m. Calculate the work done.
6J
60J
150J
1500J
Diagram shows Mary is rowing a boat. Calculate the distance travelled by the boat if the work done is 1500 J.
0.02 m
30 m
1450 m
75000 m
The work done by Ali to push a trolley for a distance of 30 m is 600 J. Calculate the force applied.
0.05 N
20 N
570 N
18000 N
The table shows the mass of four students who are asked to carry loads of different mass up a flight of stairs with a height of 5m. Who does the most work?
Ali
Abu
Azman
Akil
A stuntman with a mass of 60kg had climbed up the roof of a building whihc is 50m tall. If the power used for this stunt is 6000 w, calculate the time take by the stuntman to complete this stunt.
0.5 s
1.2 s
2 s
5 s
A 200 N weight is lifted by Mazlan to a height of 1.5 m in 3 seconds. Calculate the power needed to lift the weight.
100 w
300 w
600 w
900 w
A car with a mass of 500 kg moves with a velocity of 30 m/s. Calculate the kinetic energy of the car.
7500 J
15000 J
30000 J
225000 J
Which of the following vehicles has gravitational potential energy?
Boat
Aeroplane
Car
Train
What is the energy generated when a spring is compressed?
Heat energy
Kinetic energy
Gravitational potential energy
Elastic potential energy
State the energy found on W.
Heat energy
Kinetic energy
Elastic potential energy
Gravitational potential energy
State the energy found in Q.
Elastic potential energy
Gravitational potential energy
Kinetic energy
Heat energy
What are the factor that affect the gravitational potential energy?
Height
Mass
Velocity
Distance
